This simply isn't true. Britain is going to leave the EU. What
the verdict impacts is the process of withdrawal and potentially
how long it will take.

Research from Andrew Goodwin, the lead UK economist at
research house Oxford Economics shows how much of a change the
ruling could have on the process and timeline of Brexit. Most
importantly, the likelihood of triggering Article 50 within 12
months of the June 23 referendum has now dropped significantly
since the ruling.

Theresa May intends to trigger Article 50 by the end of March,
but Goodwin's analysis suggests that the probability of Article
50 being invoked before June 23 has dropped by 30% to 60%.

Writing in a research briefing circulated to clients on Monday,
Goodwin says (emphasis ours):

It is our view, therefore, that the main implication of
the High Court ruling is that it might take longer for the UK to
trigger Article 50. In our scenario tree analysis, we have
reduced the probability of Article 50 being triggered within a
year from 90% in our previous update to 60% now, with
the summer of 2017 now looking more likely than March. The
probabilities for the other stages of the process remain
unchanged. The net effect is that the probability of our most
likely chain of events – triggering Article 50 within a year with
the UK reverting to WTO rules upon exit – has been reduced from
25% to 17% (see Table below). The developments of the
past week underline the point we have regularly made that there
is still a huge amount of uncertainty about exactly how Brexit
will be managed.